SPARK PLUG DIAGNOSIS CHART

NORMAL
Symptoms: Brown to grayish-tan and slight electrode wear. Correct heat range for engine ad operating conditions.

Recommendations: When new spark plugs are installed, replace with plugs of the same heat range. 




WORN
Symptoms: Rounded electrodes with a small amount of a deposit on the firing end. Normal Color. Causes hard starting in damp or cold weather and poor fuel economy
Recommendations: Plugs have been left in the engine too long. Replace with new plugs of the same heat range. Follow the recommended maintenance schedule.

CARBON DEPOSITS
Symptoms: Dry sooty deposits indicates a rich mixture or weak ignition. Causes misfiring, hard starting, and hesitation.
Recommendations: Make sure the plug has the correct heat Range, Check for clogged air filter or problem in the fuel system or engine management system. Also check for ignition system problems.
ASH DEPOSIT
Symptoms: Light brown deposits encrusted on the side or center electrodes or both. Derived from oil ad/or fuel. Excessive amount may mask the spark, Causing misfiring and hesitation during acceleration.
Recommendations: If excessive deposits accumulate over a short time or mileages, install new valve guide seals to prevent seep-age of oil into the combustion chambers. Also try changing gasoline brands.
OIL DEPOSITS
Symptoms: Oily coating caused by poor oil control, oil is leaking past worn valve guides or piston rings into the combustion chamber. Causes hard starting, misfiring and hesitation.
Recommendations: Correct thr mechanical condition with necessary repairs and install new plugs.
GAP BRIDGING
Symptoms: Combustion deposits lodge between the electrodes, Heavy deposits accumulate ad bridge the electrode gap. The plug ceases to fire, resulting in a dead cylinder.
Recommendations: Locate the faulty plug and remove the deposits from between the electrodes.
TOO HOT
Symptoms: Blistered, white insulator, eroded electrode and absence of deposits. Result in shortened plug life.
Recommendations: Check for the correct plug heat range, over advanced ignition timing, lean fuel mixture, intake manifold vacuum leaks, sticking valves and insufficient engine cooling.
PREIGNITION
Symptoms: Melted electrodes, insulators are white, but may be dirty due to misfiring or flying debris in the combustion chamber. Can lead to engine damage.
Recommendations: Check for the correct plug heat range, over advance ignition timing, lean fuel mixture, insufficient engine cooling and lack of lubrication.
HIGH SPEED GLAZING
Symptoms: Insulator has yellowish, glazed appearance indicates that combustion chamber temperatures have risen suddenly during hard acceleration. Normal deposits melt to form a conductive coating Causes misfiring at high speeds.
Recommendations: Install new plugs. Consider using colder plug if driving habits warrant.
DETONATION
Symptoms: Insulator may be cracked or chipped, improper gap setting techniques can also result in a fractured insulator tip. Can lead to piston damage
Recommendations: Make sure the fuel anti-knock values meet engine requirements. Use care when setting the gaps on new plugs. Avoid lugging the engine.
MECHANICAL DAMAGE
Symptoms: May be causes by a foreign object in the combustion chamber or the piston striking an incorrect reach (too long) plug, Causes a dead cylinder, and could result in piston damage.
Recommendations: Repair the mechanical damage. Remove the foreign object from the engine and/or install the correct reach plug.

 

Source : DirectoryBengkel

COOL MOTORCYCLE GADGET

 

TASENDEN

Long-distance bike ride to invite sleepiness potentially life-threatening. Tasenden keeping you safe despite sleeping on the luggage rack motorcycle. Made from a soft material such as dacron cushion, the frame buffer Tasenden equipped helmet / head, slit to put hands and harness that supports the position of ridership to continue to stick to the driver thus avoiding the risk of falling. When used alone, turned into Tasenden removable backpack.

 

Creator : FINALIST BIA 2009 : Dony Arsetyasmoro

NEW CONCEPT MOTORCYCLE

Family scooters

Multipurpose Motorcycle

Heavy Weight Trike

2009 SAFETY HELMETS

Available on many color and size :

2009 SUZUKI BURGMAN 400

The popularity of two-wheeled transportation certainly picked up this summer, thanks mostly to the economy. Not everyone who wants one however, has a choice they can live with. Stylistically scoots sold in the states have been rather traditional and staid, that is until now. For the wanna-be crotch rocket jockey coming direct from their PT Cruiser world, Suzuki has a concept scooter that just might pique your interest.

Engine

Engine Type	Single-Cylinder
Cylinders	1
Engine Stroke	4-Stroke
Cooling	Liquid / Air
Valves	4
Valves Per Cylinder	4
Valve Configuration	DOHC
Compression Ratio	10.6:1
Starter	Electric
Fuel Requirements	Regular
Fuel Type	Gas

Transmission

Transmission Type	Continuously Variable (CVT)
Primary Drive (Rear Wheel)	Shaft

Wheel & Tyre

Front Tire (Full Spec)	120/80 R14M/C 58S
Rear Tire (Full Spec)	150/70 R13M/C 64S

Brakes

Front Brake Type	Dual Hydraulic Disc
Rear Brake Type	Hydraulic Disc

Technical Sfecifications

Wheelbase (in/mm)	62.4 / 1585
Fuel Capacity (gal/l)	3.6 / 13.5

 

WILD HOGS 2007 (Motorcycle Movies Part X end)

A group of middle-aged friends decide to rev up their routine suburban lives with a freewheeling motorcycle trip. Taking a long dreamed-of breather from their stressful jobs and family responsibilities, they can't wait to feel the freedom of the open road. When this mis-matched foursome - who have grown far more used to the couch than the saddle - set out for this once-in-a-lifetime experience, they encounter a world that holds far more than they ever bargained for. The trip begins to challenge their wits and their luck, especially during a chance run-in with the Del Fuegos, a real-life biker gang who are less than amused with their novice approach. As they go looking for adventure, they soon find that they've embarked on a journey they will never forget. 

THE WILD ANGELS 1966 (Motorcycle Movies Part IX)

This biker gang exploitation picture from director Roger Corman and co-writer and editor Peter Bogdanovich earned critical respect in Europe for its gritty documentary style. Peter Fonda stars as Heavenly Blues, the leader of a wild, roving band of leather-clad bikers. When his best friend Loser (Bruce Dern) is injured in the midst of an attempt to steal a police motorcycle, the boys kidnap their debilitated buddy from the hospital, raping a black nurse and trashing the place in the process. Blues and his friends believe they've set Loser free, but he dies not long after the escape. Staging a funeral and drunken orgy in a small town church, the gang flees is set upon by the enraged locals, leaving Blues alone to face the law. Nancy Sinatra and a then-pregnant Diane Ladd co-star; a number of real-life Hell's Angels were hired to appear in scenes, adding authenticity to the picture.

THE WORLD'S FASTEST INDIAN 2005 (Motorcycle Movies Part VIII)

For 25 years in Invercargill at the south end of New Zealand, Burt Munro (1899-1978) has been working on increasing the speed of his motorcycle, a 1920 Indian. He dreams of taking it to the Bonneville Salt Flats to see how fast it will go. By the early 1960s, heart disease threatens his life, so he mortgages his house and takes a boat to Los Angeles, buys an old car, builds a makeshift trailer, gets the Indian through customs, and heads for Utah. Along the way, people he meets are charmed by his open, direct friendliness. If he makes it to Bonneville, will they let an old guy on the flats with makeshift tires, no brakes, and no chute? And will the Indian actually respond?

ELECTRA GLIDE IN BLUE 1973 (Motorcycle Movies Part VII)

A police officer who would rather use his brains than his gun is put into a situation where neither can help him in this police drama. John Wintergreen (Robert Blake) is a sawed-off and street-smart Arizona motorcycle cop who dreams of climbing the ladder and becoming a police detective, but his ambitions are scoffed at by his partner, Zipper (Billy "Green" Bush). Wintergreen's superiors tend not to take him seriously due to his short stature, but when he stumbles upon the site of a murder, he digs up enough relevant evidence to insure his advancement to detective status. However, after a few days on the job, Wintergreen begins to realize just how corrupt his superior Poole (Mitchell Ryan) truly is after Poole attempts to frame a local hippie, Bob Zemko (Peter Cetera), for a crime he didn't commit. Adding fuel to the fire is Poole's discovery that he and Wintergreen have been dating the same woman, dancer-turned-barmaid Jolene (Jeannine Riley). Electra Glide in Blue was the first (and to date only) directorial credit for James William Guercio. Successful in the music industry as a manager and producer, Guercio was best known for his association with the top-selling jazz-rock group Chicago; several members of the band appear in the movie, as does a young Nick Nolte in a bit part. On a note of sad irony, Terry Kath, the longtime Chicago vocalist who died in 1978 from a self-inflicted gunshot to the head, plays a gun-wielding killer in this film. ~ Mark Deming, All Movie Guide
Article Source : answer.com

HELLS ANGEL ON WHEELS 1967 (Motorcycle Movies Part VI)

 Hells Angels on Wheels is a 1967 American cult film starring Jack Nicholson, Adam Roarke, and Sabrina Scharf. This film was directed by Richard Rush.
Adam Roarke starred in several other motorcycle films of the era.
Sabrina Scharf later played the role of a Sara, one of the girls at the commune, in the film Easy Rider.

A gas-station attendant with a bad attitude (Jack Nicholson) finds life more exciting after he is allowed to hang out with a chapter of the Hells Angels outlaw motorcycle club.
The Angels first take note of "Poet" after one of them inadvertently damages his motorcycle and breaks its headlight. "Poet", with far more guts than brains, challenges the Angel that hit his motorcycle (an act that would traditionally result in every Angel present participating in a gang beating of the attacker "When a non-Angel hits an Angel, all Angels retalitate"), but the leader of the Angels, Buddy (Adam Roarke), intervenes and tells Poet that the Angels will replace the headlight. In the meantime, he's welcome to ride with them while they take care of business—which turns out to be going to a bar and beating up the members of another gang who previously beat an Angel.
Poet is told to wait outside, but ends up helping the Angels. Later that night, the Angels return the favor by hunting down and beating four sailors who beat Poet four-against-one after he parted company with the group (as in The Born Losers, the issue of "good" and "bad" is muted; Poet accidentally bumps into one of the sailors and speaks rudely to him before he realizes that the sailor has three other sailors with him. The four sailors then refuse to accept his apology—but the Angels only know that four sailors beat up Poet, and he doesn't tell them how the earlier fight started). One of the sailors pulls a knife on the Angels and is then killed accidentally in the fight that follows.
Poet is allowed to ride with the Angels and is eventually elevated to "prospect" status. He is attracted to Buddy's some-time girlfriend (Sabrina Scharf) who toys with him while remaining hopelessly committed to Buddy.
Much of the story that follows consists of scenes of the Angels partying or being provoked to violence by "squares". Although the Angels are shown as being loud and generally irreverent, they are never shown starting trouble except when taking revenge on members of other motorcycle clubs.
As a scene somewhat similarly to The Wild One, one of the Angels inadvertently causes the death of a bystander—in this case when an elderly motorist loses control of his car and drives off a country road into a field. The Angels are blamed for the man's death although the story ends without the case going to court.
Buddy is written as a responsible and clear-thinking leader. Poet is cynical but much more conservative and straight-laced than Buddy.
Eventually Buddy's girlfriend succeeds in provoking a confrontation between Buddy and Poet that only one survives.

Source : Wikipedia

EASY RIDER 1969 (Motorcycle Movies Part V)

Peter Fonda, Dennis Hopper, and Terry Southern wrote the film, with 31-year old Hopper making his directorial debut for which he received the Best Film by a New Director award at the Cannes Film Festival in 1969. Fonda (also producing) stars with Hopper as the two anti-heroes of the piece, Billy and Wyatt. The film is also notable for a breakthrough performance by Jack Nicholson as lawyer George Hanson, a role which earned him the first of many Academy Award and Golden Globe nominations.The film was produced for under $400,000 and was extremely successful at the box-office, breaking in a fresh wave of independent films known as ‘New Hollywood’, much like Tarantino’s Reservoir Dogs would do 25 years later. It struck a chord with the alternative youth culture market on which the movie was based, with a pulsating rock ‘n’ roll soundtrack the likes of which had never been attached to film. Easy Rider would also break with many other Hollywood traditions, employing jump-cuts and flash forward transitions, uneven pacing and an improvisational style of acting and dialogue that includes in particular some of Jack Nicholson’s most memorable work.

HARLEY DAVIDSON AND THE MARLBORO MAN (1991) (Motorcycle Movies Part IV)

 

Set in the then-future of 1996, Harley Davidson (Mickey Rourke) is in a motel in Texas when he hears about a dangerous new street drug named "Crystal Dream" on the radio. The significance of this street drug does not arise again until later in the film. Harley then meets a friend, a cowboy nicknamed The Marlboro Man (Don Johnson) and they plan a bank robbery to help save their friend's bar from being torn down and replaced with a skyscraper. However, after they rob a bank's armored car, they discover the cargo they stole is the designer drug "Crystal Dream", not money. Chance Wilder (Tom Sizemore), who is a bank president involved in drug dealing, demands the return of the drugs. A series of increasingly deadly encounters ensue as heavily-armed hitmen hunt for Harley and Marlboro. The movie is known for a scene where Bon Jovi's "Wanted Dead or Alive" is played to an extended scene of Rourke travelling across the country on his Harley Davidson with desert scenery.

THE WILD ONE 1953 (Motorcycle Movies Part III)

"What’re you rebelling against, Johnny?" says dancing party girl Mildred to the moody, leather-clad biker boy memorably played by a young Marlon Brando. His famous answer? "Whaddya got?"

Such an insouciant toss-off may seem tame by today’s standards, but in director Laslo Benedek’s 1953 "The Wild One" (produced by Stanley Kramer), that type of reckless rebellion (without a cause) pre-Elvis, was a big deal. A very big deal. Indeed, the entire picture had enormous impact. The movie, based on a Harper’s Magazine story that itself was loosely based on a real-life incident involving a gang of bikers invading a small California town on a Fourth of July weekend, was viewed as so incendiary that the picture was banned in Great Britain until 1968. (Think how today mainstream news easily discusses the murder of San Francisco chapter Hell Angels president Mark "Papa" Guardado). Given how forced some of this movie feels today, it seems rather silly, but I love this picture -- from its slinky Leith Stevens score, to its dual versions of the alpha male black leather bad boy -- a stoic Brando and a boisterous Lee Marvin -- two cinematic geniuses stomping out the weaklings and marking their territory with inspired appetites (for destruction).

THE GIRL ON A MOTORCYCLE (1968) (Motorcycle Movies Part II)

The October 1968 issue of ABC Film Review features a great piece by Philip Bradford about the making of Jack Cardiff’s Girl On A Motorcycle. In the article the movie’s two stars (Marianne Faithfull and Alain Delon) briefly discuss what it was like to work with one another on the film. I thought it would be fun to share their quotes here along with some lovely still shots of them together on the set. I assume that most (if not all) of these photographs were taken by Jack Cardiff himself but if anyone knows otherwise, please feel free to let me know.

Newly-married Rebecca leaves her husband's Alsatian bed on her prized motorbike - symbol of freedom and escape - to visit her lover in Heidelberg. En route she indulges in psychedelic reveries as she relives her changing relationship with the two men.

MOTORCYCLE DIARIES (Motorcycle Movies I)

The Motorcycle Diaries (2004, Spanish: Diarios de motocicleta) is a biopic about the journey and written memoir of the 23-year-old Ernesto Guevara, who would years later become internationally known as the iconic Marxist revolutionary Che Guevara. The film recounts the 1952 journey, initially by motorcycle, across South America by Guevara and his friend Alberto Granado. As the adventure centered around youthful hedonism unfolds, Guevara discovers himself transformed by his observations of the life of the impoverished indigenous peasantry. The road presents Ernesto Guevara and Alberto Granado a genuine picture of the Latin American identity. Through the characters they encounter on the road, Guevara and Granado learn the injustices the impoverished face and are exposed to people they would have never encountered in their hometown. The trip serves to expose a Latin American identity as well as explore the identity of one of its most memorable revolutionaries.

 

500cc single cylinder Norton

MOST POWERFULL SCOOTERS?

GILERA GP 800
Captivating, astounding, out-of-the-box and a clear-cut winner. It’s the GILERA GP 800, the fastest, most powerful and most innovative road bike ever built by GILERA. All the performance of a 65.5 HP 90° V twin, specifically designed and constructed for this revolutionary project.
All the ridability and agility of a totally new class of vehicle, making every trip, from the shortest to the longest, a thrillingly fresh experience. All this plus cutting-edge design, exclusive technical features and the comfort of solutions dutifully designed down to the last detail. GILERA GP 800: maximum performance and unique style.

 

 

SUPERHERO SCOOTERS

 

 

 

 

WELBIKE PARASCOOTERS PICS

 

 

 

 

 

 

 

 

 

 

 

Created for use in the second world war, the Welbike was meant to be dropped from aircraft in their own containers (see above) for soldiers to use to cross battlefields just a tad faster.
From : http://home.planet.nl/

EXCELSIOR WELBIKE (WORLD WAR MOTORCYCLE)

The Welbike was a British single-seat motorcycle devised during World War Two at Station IX — the Inter Services Research Bureau — based at Welwyn, UK, for use by Special Operations Executive (SOE). It has the distinction of being the smallest motorcycle ever used by the British Armed Forces.^[1] Between 1942 and 1945, 3853 units were built and although it was not much used by the SOE, many were issued to the Parachute Regiment and used at Arnhem during Operation Market Garden.^[2]

The original prototype was designed by SOE motor cycle enthusiast Harry Lester,^[3] from an idea developed by * Lt. Colonel John Dolphin, the Commanding Officer of Station IX, the secret Inter-Services Military Research Establishment based in a mansion an hours drive north of London near the town of Welwyn in Hertfordshire^[4], which had been taken over for the war effort^[5]. Powered by a Villiers 98 cm³ single-cylinder two-stroke petrol (gasoline) engine, the Welbike was designed to fit into a standard parachute airdrop container 51 inches (130 cm), 15 inches (38 cm) high and 12 inches (30 cm) inches wide^[2] and be easily assembled and ready for use as quickly as possible.^[1] The name Welbike comes from the custom that all the clandestine equipment devised at Station IX in Welwyn had names starting with Wel, e.g, Welman, Welrod.^[6] There was very limited space in the airborne equipment container, so the Welbike had no suspension, no lights and just a single rear brake.^[7]
The fuel tank was as small as possible and had to be pressurised by a pump^{[clarification needed]} as it was too small for gravity feed. The range on maximum capacity of 6.5 pints of fuel was a respectable 90 miles at about 30 mph. To save time the tanks were pressurised before the Welbike went into action. The Welbike was then packed into the parachute container with the rear wheel to the base of the parachute canister, which had a percussion head to minimise damage on landing. Once it hit the ground all that was needed was to twist the handlebars into position and lock them on spring-loaded pins. The saddle was pulled up and the footrests folded out ready to push start the two stroke engine and ride into action.^[7] The aim was that a paratrooper could remove the Welbike from its special green container (which was marked in white lettering with the words Motor Cycle) and its easily identified coloured parachute, and be on the road within 11 seconds.^[8] The prototype survived extensive drop testing at the Special Operations School at Arisaig in Scotland where it was demonstrated to the commando forces.^[9]
The prototype was then sent to the Excelsior Ltd for further development. A number of pre-production machines were built for further testing and experimental modifications at the Airborne Forces Experimental Establishment at Sherburn-in-Elmet near Leeds in September 1942, including dropping them from aircraft to land by parachute. The Villers engine was found to be seriously under powered when ridden by a fully equipped soldier, so it was retuned for maximum power.^[1]
The simple design of the Welbike meant that it was easy and quick to produce and from 1942 went into full production for issue to airborne forces for use in parachute assaults. By 1943 it was also being widely used by ground assault forces, including the Commandos and the Royal Marines particularly for beach landings at Anzio and Normandy. The small size of the Welbike meant that it also proved very useful as a general airfield transport by the Royal Air Force and aircrews based in the large Far East airfields would 'stow away' a Welbike if they could find one.^[1]
There were three production versions of the Welbike. The first 1,183 were known as the Mark 1 and were really the developed version of the original prototype with tuned engines. These can be easily identified as they did not have a rear mudguard fitted. One thousand four hundred Mark 2 Series 1 Welbikes were produced and these had a range of minor modifications, including the addition of the rear mudguard. The final batch of 1,340 was the Mark 2 Series 2 and had 'saddle' fuel tanks with a splash shielding between them and an improved filler cap, as the original design required the removal of the pressurisation pump which was too time consuming.^[1]
In combat situations, however, the Welbike could prove a liability as paratroops needed to get under cover as quickly as possible and had to find the Welbike containers before they could even start to assemble them. The difference in weight between a parachutist and a container meant that they often landed some distance apart, rather defeating the object, and many were captured by enemy forces or lost before they could even be used. The low power and small wheels also meant that they struggled to cope adequately with the often rough battlefield roads so were often abandoned by troops who found it easier to continue on foot.^[1] Another problem for the Welbike was that by the time it was in mass production much larger gliders had been developed that could carry bigger and more powerful motorcycles such as the Royal Enfield 

Source : http://en.wikipedia.org/

DIY POCKETS BIKE PLANS

Fits In Your Pocket

Free Pocket Bike Plans

Though it will never challenge a bigger mini bike, this home made pocket bike will buzz you around for next to nothing, and is a ton of fun.
This model uses a 3/4 hp engine, and with the 20 to 1 gearing will probably hit around 11 MPH. That's more than plenty considering how small the rig is, and it will get you where you're going quick enough - around the neighborhood's back trails, to a fishing camp... Wherever! Modify it for street use (check local laws) and you'll have a sweet ride to get to class or the corner store.
The beauty of the bike is the practicality of its size. It's small, but comfortable. Excellent for gas efficient travel to and from anywhere, and there's never a parking problem. Just chain it to a parking meter or telephone pole.
Keep in mind that this vehicle is designed basically for backyard (on your property) fun. From these plans there are no brakes, lights or horn. If you want to ride on the street legally, you need to check your local laws. Take the construction drawings to your local Motor Vehicle Bureau and check out state requirements for licensing. License plates and insurance are likely both are necessary if you would like to use this bike in traffic.

Pocket Sized Frame

How to Build a Pocket Bike Frame

The engine in the plans is a 3/4-hp Olson and Rice engine (now manufactured as O&R) mounted on an 1/8-in. sheet of aluminum. This is made for some agricultural operations.
But any small engine will do.
The aluminum sheet in turn is attached to the frame with four 4-1/4" . U-bolts. (The bolts permit quick adjustment of the chain tension.) Depending upon the rider's bulk, the little bike may or may not take a steep hill. On occasion I've had to dismount and tote her up a hill under my arm.
To make it, you'll need at least 12 to 15 ft. of 5/8-in. thin wall tubing- for the frame. Build the frame in two sections and, for strength, join them with 5/8-in. steel pins inserted in the tubing at the joints. Where the pins cannot be used, wrap steel bands around the frame and braze for added strength. The brackets which support the rear wheel are bent into a U-shape, slipped into the frame and brazed.
The handlebars are two pieces of the thin wall tubing joined in the middle with two pieces of metal 1/8 x 1-1/2" x 5". spaced 3-1/4". apart. The latter are drilled out at center to receive the 5/8 x 4-1/2", bolt which serves as the turning spindle. To receive the front axle, the ends of the forks are flattened and drilled. To complete the front fork, bend the upper portions to form the handlebars. For leg clearance, bend forks slightly forward.

Fig,1

 

Fig. 2

 

Fig. 3

 

Fig. 4

 

Not Pocket Sized Power

Sprockets and Steering Design

I used a Fairbanks-Morse centrifugal clutch with an inside diameter of 1/2". Thus, I had to use a 5/8". adapter to install the clutch on the engine. The drive is provided by a No. 35 link chain. The engine sprocket has 11 teeth geared to the large sprocket on the 36- tooth jackshaft. Turning on the other end of the jackshaft is a 10-tooth sprocket geared to the 60-tooth sprocket on the rear wheel. This setup makes up a 20-to-l gear ratio.
The baby-size wheels are four-inchers fitted with pneumatic tires and 1/2" bearings.
Frame members that hold the rear axle are bent into a U-shape, then brazed onto frame for added strength. (Right)
Happily, there is no hunting for materials. All parts for my bike were purchased locally from a lawnmower and mini bike shop.
(Left) The turning spindle assembly is a 5/8 x 4'/2-in. machine bolt through frame, on which two-piece handlebars turn. Unlike the off-road bike, this design is more permanent.

 

Fig.1 

 

Fig. 2

 

Fig. 3

Putting it All Together

Final Design Schematic for Pocket Bike Plans

The seat on the bike shown was bought ready-made and fastened to the frame with four screws turned up through the metal bike-frame into its wooden base. The throttle control (and the cable) were fabricated from a bicycle hand-brake control.

 

 

I found this article from one interesting classic site

http://www.diygokarts.com/